封裝工具類

public class HttoUtils2 {
    private NetDataCallBack netDataCallback;
    private Handler mhand=new Handler();
    public <T> void getdata(String url, final NetDataCallBack netDataCallback, final Class<T> tclass) {
        //初始化一個 OkHttpClient 並且設定連線和讀取超時時間
OkHttpClient okhttp = new 
 
OkHttpClient.Builder()
                .connectTimeout(10, TimeUnit.SECONDS)
                .readTimeout(20, TimeUnit.SECONDS)
                .build();
//構造一個Request物件
Request request = new Request.Builder().url(url).build();
//通過request的物件去構造得到一個Call物件
Call call = okhttp.newCall(request);
call.enqueue(new 
 
Callback() {
            @Override
public void onFailure(Call call, IOException e) {
                netDataCallback.faild(499,e.getMessage());
}

            @Override
public void onResponse(Call call, Response response) throws IOException {
                String string = response.body().string();
 
Gson gson=new Gson();
T t = gson.fromJson(string, tclass);
                final Message msg = Message.obtain();
msg.what=ok;
msg.obj=t;
mhand.post(new Runnable() {
                    @Override
public void run() {
                        netDataCallback.success(msg.obj);
}
                });
}
        });
}

    //post請求
public <T>void getLoadDataPost(String url, final NetDataCallBack netDataCallback, final Class<T> tClass, RequestBody body){
        this.netDataCallback = netDataCallback;
OkHttpClient okHttpClient = new OkHttpClient.Builder()
                .readTimeout(20, TimeUnit.SECONDS)
                .connectTimeout(10, TimeUnit.SECONDS)
                .build();
        final Request request = new Request.Builder().url(url).post(body).build();
Call call = okHttpClient.newCall(request);
call.enqueue(new Callback() {
            @Override
public void onFailure(Call call, IOException e) {
                netDataCallback.faild(499,e.getMessage());
}

            @Override
public void onResponse(Call call, Response response) throws IOException {
                T t = new Gson().fromJson(response.body().string(), tClass);
                final Message msg = Message.obtain();
msg.what = OK;
msg.obj = t;
mhand.post(new Runnable() {
                    @Override
public void run() {
                        netDataCallback.success(msg.obj);
}
                });
}
        });
}
}

建立介面

public interface NetDataCallBack<T> {
    void success(T t);
    void faild(int positon, String str);
}

Activity運用

implements NetDataCallBack<Data>

public void aaa(){
    HttoUtils2 utils2 = new HttoUtils2();
utils2.getdata(url,this,Data.class);
}


@Override
public void success(Data data) {
                        }

@Override
public void faild(int positon, String str) {

}